Investigation of periodic boundary conditions in multipassage cascade flows using overset grids

Date

1999-04-01

Author

Tuncer, İsmail Hakkı
Sanz, W

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A Navier-Stokes solutions method with overset grids is applied to unsteady multipassage cascade flows, and the unsteady blade loadings are compared against the single-passage solutions with the direct store interblade boundary condition. In the overset grid solutions, the multipassage domain is discretized with O-type grids around each blade and a rectangular background grid. Blade grids are allowed to move in time relative to the background grid as prescribed by the oscillatory plunging motion. The overset grid method uses a simple, robust numerical algorithm to localize moving intergrid boundary: points and to interpolate solution variables across grids. Computational results are presented for two and four-passage, subsonic and transonic flows through a turbine and a compressor cascade. The overset grid solutions over the multipassage periodic domains agree well with the single-passage solutions and the experimental data. It is concluded that the time linearization error introduced by the direct store approach is negligible in the range of flow conditions studied.

Subject Keywords

Mechanical Engineering

URI

https://hdl.handle.net/11511/57292

Journal

JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME

DOI

https://doi.org/10.1115/1.2841320

Collections

Department of Aerospace Engineering, Article

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Citation Formats

İ. H. Tuncer and W. Sanz, “Investigation of periodic boundary conditions in multipassage cascade flows using overset grids,” JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, pp. 341–347, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57292.